: Hi,: I have a 98 M3 with ERT's Vortech SC unit and I have just recently added a: boost gauge to my car, due to suspicion that my car is not making full: boost. And well, what do you know? Confirming to my suspicion, my car was: only making 3.5lbs of boost at 6000rpm. Now here is my question, what could be: causing this? Bad connection? wrong crank shaft? what?! I have been trying: to figure it out with my bare naked eyes and I couldn't see anything wrong: with my setup......pls help!!